Demand for a new drug that controls ulcers is given by equat

Demand for a new drug that controls ulcers is given by equation Q = 150 - 3P (Q is bottles of medicine and P is the price per bottle in dollars). Using inverse demand (because P is graphed on the vertical axis), what is the slope of the demand curve?

Solution

Given Q= 150-3P

then P = 50-Q/3

Assume the above in the form of y= a+bx where slope =B

therefore a= 50, b = -1/3 then slope = -1/3